Highlight:
Bosch Rexroth MHD041B-144-PP1-UN Synchronous AC Motor for Industrial Automation
Rexroth MHD041B-144-PP1-UN (Order Number R911280213)
Overview
The Bosch Rexroth MHD041B-144-PP1-UN is a compact yet powerful synchronous servo motor that belongs to the MHD series, renowned for delivering reliability, precision, and long service life in industrial automation. This model combines high-performance electromechanical design with robust environmental protection, making it a versatile option for automation and manufacturing tasks.
The type code MHD041B-144-PP1-UN provides valuable insights:
-
041: motor frame size, with 82 mm flange and 50 mm centering diameter .
-
B: medium-length housing for higher torque output than “A” models.
-
144: winding configuration designed for optimized performance.
-
PP1: encoder and shaft options—indicating a plain shaft with keyway plus high-resolution encoder.
-
UN: universal, rotatable connector orientation and natural convection cooling.
Its assigned order number, R911280213, identifies the exact configuration for spare parts, ordering, and system integration.
Key Features
-
Medium-Length Housing with High Torque Capacity
-
The “B” length increases continuous torque at standstill to approx. 2.7 Nm, compared to 1.3 Nm for the “A” length .
-
Suitable for medium-load applications requiring durability and consistent power.
-
PP1 Option: Shaft and Encoder Package
-
Provides a shaft with keyway for secure coupling to pulleys, gears, or direct drive systems.
-
Equipped with a high-precision encoder (absolute multiturn feedback) for closed-loop control.
-
Enhances accuracy in positioning, speed regulation, and synchronization tasks.
-
Rugged Mechanical Design
-
IP65 protection class for dust- and water-resistant operation.
-
Maintenance-free bearings lubricated for life.
-
Aluminum housing ensures high mechanical stability and optimal thermal dissipation.
-
Digital Servo Feedback
-
Universal Integration
-
Standardized flange (DIN 42948) for straightforward mechanical mounting.
-
Universal rotatable connectors simplify cabling in tight machine layouts.
-
Compatible with Rexroth IndraDrive and EcoDrive systems for seamless operation.
Technical Data: MHD041B-144-PP1-UN
| Specification |
Value |
| Type |
Rexroth Synchronous Servo Motor MHD041B-144-PP1-UN |
| Order Number |
R911280213 |
| Cooling Type |
Natural convection |
| Frame Size |
041 (82 mm flange, 50 mm centering diameter) |
| Frame Length |
B (medium length) |
| Continuous Torque at Standstill (MdN, 60K) |
~2.7 Nm |
| Continuous Current at Standstill (IdN, 60K) |
~5–6 A |
| Characteristic Motor Speed (nK) |
4,500–6,000 min⁻¹ |
| Rated Speed (nN) |
3,000–4,500 min⁻¹ |
| Rated Power Output (PN) |
~0.8 – 1.2 kW |
| Peak Current (Imax) |
up to ~18 A |
| Maximum Torque (Mmax) |
~7–8 Nm |
| Maximum Speed (nmax) |
7,500 min⁻¹ |
| Torque Constant (KM at 20 °C) |
~0.45 Nm/A |
| Voltage Constant (KE eff at 20 °C) |
~40 V/1000 min⁻¹ |
| Winding Resistance (R12) |
~6–8 Ω |
| Winding Inductivity (L12) |
~10–15 mH |
| Pole Pairs (p) |
3 |
| Moment of Inertia (J) |
~1.2 × 10⁻⁴ kg·m² |
| Thermal Time Constant (Tth) |
~25 minutes |
| Motor Mass (m) |
~3.5 – 4.0 kg |
| Encoder Type |
Multiturn absolute digital encoder (PP1 option) |
| Shaft Type |
Shaft with keyway (P option) |
| Holding Brake |
Without (option 0) |
| Connector Orientation |
Universal rotatable (U) |
| Degree of Protection |
IP65 |
| Insulation Class |
F |
| Ambient Temperature Range |
0 – 40 °C |
| Storage Temperature |
-20 – +80 °C |
| Installation Altitude |
Up to 1,000 m above MSL |
Application Areas
The MHD041B-144-PP1-UN is particularly suited to automation environments where precision, torque stability, and long service intervals are essential:
-
Machine Tools: Feed drives, spindle positioning, and tool handling.
-
Packaging Machinery: Motion-intensive processes such as labeling, filling, and sealing.
-
Printing and Paper Processing: Consistent speed control for roller and cutter drives.
-
Robotics: Pick-and-place units, compact articulated arms, and indexing tables.
-
Textile and Processing Machines: Continuous duty cycles requiring accuracy and durability.
-
Material Handling: Automated conveyors and sorting systems.
Design and Construction
The MHD041B-144-PP1-UN is a permanent magnet synchronous motor with electronic commutation, designed to deliver high torque density in a compact package.
-
Rotor: Permanent magnets ensure compact design and high torque.
-
Stator: Precision copper windings minimize losses and maximize efficiency.
-
Encoder: PP1 encoder integrates seamlessly with Rexroth drives for fine control.
-
Housing: Aluminum, naturally cooled, lightweight yet mechanically strong.
-
Bearings: Sealed, lifetime-lubricated bearings reduce service needs.
This design ensures both high dynamic response and long service reliability.
Advantages for End Users
-
Compact Power: High torque-to-size ratio for applications with limited installation space.
-
Maintenance-Free: No brushes, sealed bearings, and robust housing reduce downtime.
-
Flexibility: Can be mounted in any position and integrated into diverse systems.
-
Safety: Built-in temperature monitoring and IP65 protection improve reliability.
-
Precision: Encoder feedback allows fine control for demanding motion tasks.
Ordering Information
To achieve optimal system performance, pair this motor with Rexroth IndraDrive controllers and certified Rexroth cabling.
Conclusion
The Rexroth MHD041B-144-PP1-UN (R911280213) stands as a robust and versatile synchronous servo motor, engineered to meet the demanding requirements of modern automation. With its high torque density, PP1 encoder precision, rugged IP65 housing, and maintenance-free design, it delivers long-term reliability and accuracy.
For industries seeking a compact, medium-duty servo solution that excels in efficiency, precision, and durability, this motor represents a dependable choice, reinforcing Rexroth’s reputation as a global leader in automation and drive technology.
Your message must be between 20-3,000 characters!
